I have a 1991 400E, and it has developed a problem with the battery being drained overnight.

It is sitting outside with a freshly charged battery. The battery is only a couple of months old, replaced when I put in a new alternator. I diconnected the negative cable, and I am measuring 4.25 amps draw with every single fuse pulled. I disconnected the alternator too, and the draw didn't change.

There is nothing still on in the car... No lights, nothing.

Where else can I look? I am a little stumped...

The wiring diagram for this car is a nightmare... It's like 45 pages long or so...